Salar de Uyuni
Well, the best time to visit just depend on your personal taste. We visited this place towards the end of october, in the summer season. It tends to be Sunny and dry then. But if you want to see the mirror effect on the saltflats, you should consider coming january to march. This mirror effect is awesome too. A reason for a revisit in the future. You can visit the saltflats all day, from Sunrise till sunset they are beautiful.
Salar the Uyuni (Uyuni salt flats) is just an amazing place! We started the tour in Uyuni village. We'd choozen for Quechua Connection, because of the many good reviews. They are the only company that has bike rides on the saltflats, and we really loved to do this. You get mixed up with other people. There were 6 people in our car, the driver, the guide (Lucho), we two and 3 Aussies. A perfet match. First we drove to the train cemetry, which is close to the village. It is weird to see all the trains rusting away, but it has a special atmosphere too for taking pictures. Then we visited a small factory where we could see the salt making. After that we were on the bikes for about 5 to 7 kilometers. It was hard to ride the bike, just as if you were biking thruough snow. It does not go smooth anyway. After that a well deserved lunch on the salt flats. We could not see any companies there. Then we visited a salthotel. which is nothing really special about, but it had toilets. You could see all the flags and banners from other countries there. And there is also the Dakar monument, which we thought added something special. It is very huge!!! In the afternoon you visit the Isla Inca Huasi. There are many islands in the saltflats, and since you cannot measure distance, it seems as if all of them were floating. Very weird. At Isla Inca Huasi we could hike the trail and you come on top and have a spectacular view over the flats. There are many huge cactus trees on the island, and a lot of them were blooming. We also saw some birds there, nestling in the giant cactus.
Then we drove to a cave, no other companies were there. From inside the cave we saw the sun coming down and we made some funny pics. Our guide had good ideas for this.
Sunset itself we had down on the flat. On one side we saw the sun going down, and on the back side the sky turned pink and purple, even more beautifull. We have never seen such a landscape before, and can totally recommend you to go here. This was only day 1 of our 3 day tour there. The next day we visited coloured lakes, vulcano's and saw much wildlife!